Volume 10 Article informations The valorization of iron ore Jerissa in agronomy as iron chelate/complex (EDTA/Fe (S), HBED/Fe (S) and D/Fe (S)) for alleviate iron deficiency in calcareous soil Ilham Grioui,Mohamed Nouri , Abdssatar Hatira Abstract Iron is one of the essential micronutrients for plants, but it can’t absorb in calcareous soils due to its low solubility. This condition requires the treatment by iron based chelates or complexes. In this work, it has been evaluated the efficacy to applicate iron ore Jerissa as an iron fertilizer in alkaline soils for alleviating iron chlorosis and to improve the ferric state of the plant. Three product EDTA/Fe (S), HBED/Fe (S) and Digestat/Fe (S) were prepared with natural iron and applied in soil to study their potentiality on the correction of iron deficiency in Tomato plants. The trial was setup in randomized block design with three replications for each treatment and three plants per pot in order to supply sufficient dry matter. Different physical and chemical analyses were used for characterized iron ore Jerissa. The SPAD chlorophyll index, iron content in plants and iron in soils were determined at the end of the trial. The three treatments have increased the iron content in the plants and correct iron deficiency. Iron ore Jerissa with different complexing agents could be useful to prevent iron chlorosis and reducing soil pH. Key words: Valorization, Siderite, Limestone soil, ferric chlorosis, iron fertilizer, Tunisia